With the green development of the iron and steel industry, the problem of chlorine element disposal starts to be highlighted, which eventually becomes the disposal of high-salt wastewater. The main sources and characteristics of high-salt wastewater in the iron and steel industry are systematically sorted out, and the advantages and disadvantages of the slag flushing method, the flue waste heat evaporation method, and the evaporative crystallization salt separation method in the zero-discharge treatment technology of high-salt wastewater are compared in details. The results show that the high-salt wastewater mainly comes from by-products produced by environmental protection facilities in the process, production upgrading and pretreatment of salt-containing solid waste; on the premise of not returning to the production process and recycling, the evaporative crystallization and salt separation method can effectively recover Chlorine resources without secondary pollution, but problems of high cost and clogging should be focused on. The research conclusions can provide an important basis for the emission reduction of high-salt wastewater in the iron and steel industry.